Could it be... his knot tying isn't up to standard?
Many doctors practice their surgical skills arduously, using toothpicks at meals, or clipping beans with tweezers, or practicing suturing with grapes and intestines, and so on.
Knot tying should be one of the easier basic skills to practice.
Unlike suturing, sometimes to simulate the feel of human skin as closely as possible, you have to practice with pig skin.
If it's just basic knot tying, you can practice with any piece of cloth.
For more advanced practice, you'll need props like tofu or sponges.
Ruan Xiaoqin struggled for a long time and finally tied a square knot.
But that very knot ruined all his previous efforts.
Because the knot wasn't tied well, the suture loosened, and the previously sutured tendon split open again.
His face turned red, he cut the suture and had to sew it again.
If he had mastered the slip knot, he wouldn't need to cut the sewn suture at this moment.
